CNRFC - Hydrology - Observed River/Reservoir Conditions

TRINITY RIVER - HOOPA (HOOC1)

Latitude: 41.05º N	Longitude: 123.68º W	Elevation: 333 Feet
Location: Humboldt County in California		River Group: North Coast

Monitor Stage: 44.0 Feet

Flood Stage: 48.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	58,300	30.79	Feb 04, 2025
2024*	46,500	28.44	Jan 14, 2024
2023*	66,500	32.28	Mar 15, 2023
2022*	16,600	20.91	Jan 8, 2022
2021*	13,300	19.67	Feb 16, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*	231,000	40.30	Dec 22, 1964
1956	190,000	36.90	Dec 22, 1955
1974*	145,000	45.98	Jan 16, 1974
1958	125,000	29.15	Feb 19, 1958
1940	124,000	31.20	Feb 28, 1940
1983*	122,000	43.16	Jan 27, 1983
1997*	122,000	42.97	Jan 01, 1997
* Discharge affected by regulation or diversion
** Most recent continuous record back to Oct 1931 with segmented periods back to Oct 1911

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ105)

Tonight: Rain showers likely. Snow level 5000 feet overnight. Lows 42 to 52.

Wednesday: Mostly cloudy. Slight chance of rain showers in the morning. Snow level 4500 feet. Highs 47 to 60.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 34 to 44.

Thursday: Partly cloudy. Highs 52 to 66.

Thursday Night: Mostly cloudy. Lows 39 to 49.

Friday: Partly cloudy. Highs 58 to 70.

Friday Night and Saturday: Mostly cloudy. Chance of rain. Lows 43 to 53. Highs 55 to 70.

Saturday Night: Mostly cloudy. Patchy valley fog. Chance of rain. Lows 41 to 51.

Sunday and Sunday Night: Mostly cloudy. Chance of rain. Highs 51 to 64. Lows 40 to 50.

Monday: Partly cloudy. Slight chance of rain. Highs 55 to 68.

Monday Night and Tuesday: Mostly clear. Lows 37 to 47. Highs 57 to 72.

Flood Impacts
57.0 Feet	Severe flooding of roads, bridges and structures in and around low areas of the river is expected. Many road closures are likely including Highway 96 at several locations between Willow Creek and Weitchpec. Many homes and businesses in valley areas will be innundated.
55.0 Feet	Extensive and severe flooding between Willow Creek and Weitchpec, and flooding of many homes and businesses in the valley areas. Expect closure of Highway 96 between Willow Creek and Weitchpec.
53.0 Feet	Extensive flooding of all low lying areas adjacent to the river, including Highway 96 north and south of Hoopa. Significant damage to structures in these areas is likely.
51.0 Feet	Extensive flooding of all low lying areas adjacent to the river including Highway 96 both north and south of Hoopa is likely. Significant damage to structures in these areas is possible.
48.0 Feet	Considerable flooding of low lying areas adjacent to the river including Highway 96 is likely. Significant damage to structures in these areas is possible.
46.0 Feet	Flooding of many low lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
44.0 Feet	Minor flooding of the lowest lying areas may occur.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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